Safety pin



Oct. 6, 1931. o. KERSTENS SAFETY PIN Filed May 9, 1950 Patented Oct. 6 1931 UNITED STATES PATENT OFFICE OTTO KERSTENS, OF BREMEN, GERMANY SAFETY PIN Application filed May 9, 1930, Serial No. 451,138, and in Germany September 23, 1929.

The present invention relates to safety pins gether to lie over each other, as shown in Figwhich possess many advantages over such ure 1. When the eyes are bent as described, pins now in use. It is well-known that such the connecting bar 6 forms a clip around pins are actuated by elastic force, increasing the arms a, b and prevents displacement of more and more when closing the pins and arms and eyes.

reaching the maximum amount at the 1no- The usual pinretainer f is secured to the ment when the free arm is just about to be arm 6 to form a means for locking the arm a, hooked behind the cap. Moreover, it is imwhich forms the pin proper. portant that the pin should possess a certain From the foregoing description, it will be 10 elastic limitation of its action, because only seen that the structure is formed from a sin- 60 on that condition will it be impossible for the gle piece of wire, the pin retaining clip, of moving arm or the stationary arm to be lifted course, being excepted, and that the manner beyond the prescribed maximum limit. of bending the wire not only forms sprin Accordingly, the present invention concoils but a means for holding the coils an sists in the main of a clip embracing the eyes arms in relative position. 65

of the pin and forming an integral whole to W hat I claim is gether with the eyes and the arms. The A safety pin comprising a pair of overmanufacture of a. pin designed in this fashion lapping eyes, spaced apart arms extending is exceedingly simple. All that is necessary from the eyes, a cross bar connecting the two is to bend a piece of wire by winding it round eyes and extending therefrom in opposite two small pins or pegs, after which the eyes directions toward the respective arms and thus formed are folded together. The spring bent around same to form an embracing clip action is excellent, becauseowing to the exaround said arms, and a cap having a recess tension of the eyes into a clipa coaxially and secured to one of the arms, the recess acting moment is introduced, thus ensuring forming a catch for reception of the free end that the degree of elasticity remains uniform. of the opposite arm. \Vhenever it is intended to secure an equal in testimony whereof I aflix my signature. amount of spring action by means of an eye OTTO KERSTENS. formed by more windings than one or two, i

such an eye becomes relatively thick, because 30 the different windings must lie on top of one another. The present invention does away with this drawback, because there will never be more than two windings on top of one an- 3 other. 85

The accompanying drawings show, by Way of example, how the invention works. More particularly,

Fig. 1 shows the pin with the movable arm,

' and r Fig. 2 shows the unfinished pin after the first stage of its manufacture.

A suitable piece of wire, as shown in Figure 2, is bent around two pegs to form two eyes 0, (Z, a transverse connecting bar 6, and 95 two spaced, parallel arms 'a, b. The bar 6 is bent around the arms a at a, and also bent around the arm I) at Z)", which places the eyes on the inside of the Vertical plane of the arms 5 a, b. There the two eyes are squeezed to- 10 

